<template>
  <view>
    <my-search @click="gotoSearch" :bgColor="bgcolor" :radius="radius"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧滚动区 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}">
        <!--  -->
        <block v-for="(item,i) in cateList" :key="i">
          <!-- 左侧item项 -->
          <view :class="['left-view-item', i === active ? 'active' : ' ']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      <!-- 右侧滚动区 -->
      <scroll-view class="right-scroll-view" :scrollTop="scrollTop" scroll-y="true" :style="{height:wh+'px'}">
        <!-- 右侧item项 -->
        <view class="cate-lv2-item" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 右侧标题 -->
          <view class="cate-lv2-title">
            {{item2.cat_name}}
          </view>
          <!-- 右侧三级分类 -->
          <view class="cate-lv3-list">
            <!-- item -->
            <view class="cate-lv3-item" v-for="( item3, i3) in item2.children" :key="i3" @click="goodsList(item3)">
              <!-- 图片 -->
              <image :src="item3.cat_icon.replace('api-ugo-dev','api-ugo-web')"></image>
              <!-- 文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
    data() {
      return {
        // 屏幕的可用高度
        wh: 0,
        // 数据列表
        cateList: [],
        active: 0,
        // 2级数据列表
        cateLevel2: [],
        // 滚动条置顶
        scrollTop: 0,
        // 颜色
        bgcolor: '#c00013',
        radius: 8,
      };
    },
    onLoad() {
      // 调用api获取系统信息
      const sysInfo = uni.getSystemInfoSync()
      console.log(sysInfo.windowHeight)
      // 将可用窗口高度 转存  // 50是 搜索组件的高度 以便完整显示
      this.wh = sysInfo.windowHeight - 50
      //获取数据方法执行
      this.getCateList()
    },
    methods: {
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get("/api/public/v1/categories")
        console.log(res)
        if (res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        //二级数据转存 先默认显示第一项
        this.cateLevel2 = res.message[0].children
      },
      activeChanged(i) {
        this.active = i
        // 在通过点击事件动态转存 
        this.cateLevel2 = this.cateList[i].children
        // 切换tab滚动置顶
        this.scrollTop = this.scrollTop === 0 ? -1 : 0
      },
      // 跳转页面+传参
      goodsList(item3) {
        uni.navigateTo({
          url: "/subpkg/goods_list/goods_list?cid=" + item3.cat_id
        })
      },
      gotoSearch() {
        console.log('ok')
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    },
  }
</script>
<style lang="scss">
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-view-item {
        background-color: #f7f7f7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;

        &.active {
          background-color: #FFFFFF;
          position: relative;

          &::before {
            display: block;
            content: ' ';
            width: 3px;
            height: 30px;
            background-color: #c00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }
  }

  .cate-lv2-title {
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
  }

  .cate-lv3-list {
    display: flex;
    flex-wrap: wrap;

    .cate-lv3-item {
      width: 33.3%;
      display: flex;
      flex-direction: column;
      align-items: center;
      margin-bottom: 10px;

      image {
        width: 60px;
        height: 60px;
      }

      text {
        font-size: 12px
      }
    }
  }
</style>
